Rebecca Kool was the daughter of Asser Kool and Eva Aandagt whom both died befor the war. Rachel Lijmer was her stepmother. Her halfbrother was 541902.
Stadsarchief Amsterdam, archiefkaarten Rachel Lijmer en Rebecca Kool
In addition, a Jokos file (number 30739) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.